and you wanna test it in not-so-normal conditions

until that's not kickback, you wanna give it all

of the edge cases so it know what's going on.

- [Destin] Why are you smiling, why are you smiling?

(laughing)

- I think we should test the edge cases.

- I normally say, "Hey, it's me Destin,

"welcome back to Smarter Every Day,"

but there's nothin' smart about this.

So here's the deal, this is a rocket saw

and I wanna say I'm sorry but I'm totally not.

Here's the deal, here's how we got here.

So in the last video, we explained

how we had incorporated machine learning

into power tools in order to keep them

from hurting you, right?

So the way you work with a machine learning algorithm

is you get a really big fancy computer

and you start to sort events out

like data collection events.

In our case, normal use of a saw

so we see like a normal thing that happens with a saw,

we put it in the normal bucket, right?

But as we see these things that are dangerous,

we would put those over here in the dangerous pile

and if you do this enough, eventually the computer

can sort between dangerous events and normal events.

You can't test everything in the world,

okay so you come up with all these really weird things

and you do your best to like sort 'em out

but eventually you get to the edge cases

and you have to make a decision

like as a human, where do these things go?

One of those things we thought about was a rocket saw.

Obviously the rocket saw's gonna go

in the danger pile and we're not actually gonna

collect data on this shot but we thought

about a rocket saw and once you realize

you're smart enough to make a rocket saw--

So we got a rocket powered saw

and we're gonna see what happens.

I think it's just gonna stop back there.

I don't think it's gonna make it this far, do you?

- [Man] Yeah, no bets buddy.

- [Destin] Four rockets, we got two Fs and two Ds.

- If only we had five.

- [Destin] If only we had fire.

And you've got it all wired up, ready to go, right?

- [Man] Yeah.

- [Destin] This GoPro lookin' back at the blade

is gonna be nice.

Like the GoPro should see the engagement of the teeth

and stuff, this is so dumb, I love it.

(saw running)

I think it makes--

(laughing)

Alright, you're tall, you gotta turn that beast on.

So it's ready to fire, right?

You've got the thing wired up, right?

- Right. - Okay.

This is one of the more noble things

I've ever done in my life.

Now would be an excellent time

to make a prediction on what you think

this thing is gonna do to the wood.

Also, the very first video I ever uploaded

to this channel, called, "How to Light

"a Bonfire with Rockets," cringe-worthy.

It's like the first video ever made.

It also involves shooting a rocket

from this exact same tree.

(beeping)

(saw running)

Alright, lemme go arm the high-speed camera.

- [Man] Oh my god.

(laughing)

(saw running)

Three, two, holy crap, one.

(rocket whizzing)

One!

(rocket whizzing)

(laughing)

What happened?

Holy crap.

- [Destin] Get the GoPro before it catches on fire.

- [Man] If it's still there.

- [Destin] Oh, it's still there.

- [Man] Is it still there? - Oh!

(laughing)

Totally survived.

- [Man] It bounced up. - [Destin] Yeah I don't even

think, like it didn't even try.

It didn't even try. - [Man] It just rolled on it.

- [Man 2] We got it man. - [Destin] Did we, dude?

We totally did, oh!

(laughing)

(slow motion rocket whizzing)

That's a thing you can do with friends.

- [Man] On a Friday night. - Who needs drugs when

you can do stuff like this, right?

Let's zoom in closer and see if the saw blade

does what you thought it would do.

(laughing)

Oh my goodness, my heart.

Oh it just dinged the screen?

Who cares, did you see what we just did with that?

(laughing)

This episode of Smarter Every Day

is sponsored by Casper Mattress and Prince Rupert and I

are going to unbox a Casper Mattress for you.

No, come here.

(meowing)

This mattress is called The Wave.

The Wave is designed specifically for the needs

of side sleepers like my wife and I.

The whole deal here is that it has

a perforated breathable memory foam

to keep your spine aligned during the night

and keep you cool because it's breathable.

As you press on something, the amount of squish

is a function of the elasticity of the material.

The fancy thing they've done with The Wave

is they've varied the elasticity

from the head to the foot of the bed

so you get more elasticity around the shoulder areas

cause most people's shoulders are wider than their hips

so it aligns your spine as you sleep

on your side which is a big stinkin' deal

because my wife is a side sleeper.

First two nights with Casper Wave, what do you think?

- I like it, I like it.

Am I supposed to look at the camera

or am I supposed to look at you?

- [Destin] Does it matter?

You wanted a side sleepin' mattress,

does it do what you need?

- I did want one, it does what I need, absolutely.

- All Wave purchases come with a free

in-home set-up and a hundred night trial.

If you don't like it, let 'em know,

they'll come get it, no questions asked.

Their pillows are also awesome by the way,

we've got the soft layer on the outside

and a firm layer on the inside

so each side of the pillow feels like

the cool side of the pillow.

They didn't ask me to talk about the pillows,

I asked them if I could talk about their pillows.

You can get 50 dollars off a core mattress

or a hundred dollars off The Wave mattress

which is ideal for side sleeping

if you go to Casper.com/smarter

use the promo code smarter at checkout,

you're gonna get a better night's sleep,

they have engineers workin' on this stuff.

You're still here which means you understand.

We're both winnin' here, my whole life

led up to this moment to make the rocket saw.

Your whole life led up to watching this video,

we're all winners.

Thanks.

There was a smart reason that

we got to that point, I promise.

- I think we yelled, "For science!" several times.

- Yeah, that's how that works.

Alright, well, you're getting smarter every day.

Have a good one, thanks for watchin'.